CN1692581A - Transmission power deciding apparatus and transmission power deciding method - Google Patents
Transmission power deciding apparatus and transmission power deciding method Download PDFInfo
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- CN1692581A CN1692581A CNA200380100552XA CN200380100552A CN1692581A CN 1692581 A CN1692581 A CN 1692581A CN A200380100552X A CNA200380100552X A CN A200380100552XA CN 200380100552 A CN200380100552 A CN 200380100552A CN 1692581 A CN1692581 A CN 1692581A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/20—TPC being performed according to specific parameters using error rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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Abstract
In a multimedia broadcast/multicast service, in order to control the ratio of mobile stations capable of receiving information with high quality among mobile stations existing in a cell, a modulation section modulates a first layer code string and second layer code string heaving hierarchically different error rates into a symbol including both layer code strings, a target value storage section stores a target value corresponding to the ratio of high quality mobile stations which receive both the first layer code string and second layer code string without errors, a transmit power determining section determines to increase transmit power when the ratio of high quality mobile stations calculated by a ratio calculation section is less than a target value stored in the target value storage section and a transmit power control section increases transmit power of the modulated symbol according to the determination.
Description
Technical field
The transmitted power that the present invention relates to use in mobile communication system determines that device and transmitted power determine method.
Background technology
In moving communicating field, recently, advancing technical research (for example, referring to " 3GPP TS 22.146 V6.0.0 (2002-06): third generation collaborative project about multimedia broadcast/group broadcast service (hereinafter referred to as " MBMS "); Technical specification group services and system aspects; Multimedia broadcast/group broadcast service; (version 6) in June, 2002 in stage 1 ").The communication of carrying out in MBMS is not the communication of (point-to-point, P is to P) one to one, but the communication of one-to-many (point-to-points: P is to M).That is, in MBMS, a base station sends identical information (for example, music data, vedio data etc.) to a plurality of travelling carriages simultaneously.
MBMS has broadcast mode and multicast pattern.Broadcast mode is wherein to resemble the current radio broadcasting when all travelling carriages send the pattern of information, and multicast pattern is the pattern that wherein only sends information to the specific travelling carriage that adds newsgroup or other business.
The advantage of carrying out MBMS comprises following: promptly, when each travelling carriage uses a channel and waits when receiving the information that sends from the base station by the stream service, if ask the quantity of the travelling carriage of described information to increase, the then increase of the load on described wireless channel.But when using MBMS, even the quantity of travelling carriage increases, all that travelling carriage still uses same channel to come reception information, therefore can increase the quantity of the travelling carriage that can receive described information and is not increased in load on the wireless channel.Current, the distribution of business information, the distribution of music, the distribution that covers in the on-the-spot broadcasting of the distribution of the news of travelling carriage, sports tournament etc. are taken as the business of using MBMS to obtain, and the transmission rate of studying with about 8-256kbps provides these business.
And have the such research about MBMS: about the transmitted power of information, base station apparatus uses the transmitted power that guarantees minimum mass to send information to the travelling carriage at cell boarder.
At this, in MBMS, use to guarantee that at base station apparatus the transmitted power of minimum mass comes to send under the situation of information to the travelling carriage at cell boarder, such as the travelling carriage of cell boarder, can only receive low-quality information away from the travelling carriage of base station apparatus.But, when using MBMS to send the advertising message of product advertising, advertiser may require even receive information away from the travelling carriage of base station apparatus with higher quality, and may require to be increased in the ratio that can receive the travelling carriage of described information in the travelling carriage that exists in the sub-district in high quality.
Summary of the invention
The object of the present invention is to provide a kind of transmitted power in MBMS to determine that device and transmitted power determine method, they can be controlled at the ratio that can receive the travelling carriage of described information in the travelling carriage that exists in the sub-district in high quality.
The present invention carries out transmission power control for the code element that comprises a plurality of code strings, and the error rate of described code string hierarchically changes according to the ratio of the travelling carriage that can receive described information in the sub-district in the travelling carriage that exists in high quality.By this way, the ratio that can receive the travelling carriage of described information in the sub-district in the travelling carriage that exists in high quality might be remained on the level of expectation.
Description of drawings
Fig. 1 is the block diagram that illustrates according to the configuration of the base station apparatus of embodiments of the invention 1;
Fig. 2 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 1;
Fig. 3 illustrates the transmission condition according to the code string of embodiments of the invention 1;
Fig. 4 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 2;
Fig. 5 is the block diagram that illustrates according to the configuration of the base station apparatus of embodiments of the invention 2;
Fig. 6 illustrates the method according to definite transmitted power of embodiments of the invention 2;
Fig. 7 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 3;
Fig. 8 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 4;
Fig. 9 is the block diagram that illustrates according to the configuration of the base station apparatus of embodiments of the invention 4;
Figure 10 illustrates the classification results according to embodiments of the invention 4.
Embodiment
Referring now to accompanying drawing, describe embodiments of the invention in detail.
(embodiment 1)
Fig. 1 is the block diagram that illustrates according to the configuration of the base station apparatus of embodiments of the invention 1.Base station apparatus shown in Figure 1 is used for wherein carrying out and designing MBMS to send the system of the code element of identical content to a plurality of travelling carriages.This base station apparatus comprises hierarchical coding part 101, CRC (cyclic redundancy check (CRC)) code addition part 102, CRC code addition part 103, modulating part 104, transmission power control part 105, wireless portion 106, antenna 107, ratio calculating section 108, transmitted power determining section 109 and desired value storage area 110.And transmitted power determines that device comprises ratio calculating section 108, transmitted power determining section 109 and desired value storage area 110.
And hierarchical coding part 101 comes data are carried out coding in error rate hierarchically different mode between ground floor code string and second layer code string.That is, it carries out coding (that is, the error rate of ground floor code string becomes littler than the error rate of second layer code string) with the ground floor code string than the mode of the more impossible generation error of second layer code string.For this reason, hierarchical coding part 101 makes the encoding rate of ground floor code string less than the encoding rate of second layer code string.
And, suppose that ground floor code string and second layer code string all are to have for example code string of the transmission rate of 32kbps.And, suppose that 32kbps is the transmission rate that should be guaranteed at least by MBMS.Therefore, when travelling carriage uses ground floor code string and second layer code string to carry out decoding, obtain the decoded data of the transmission rate of 64kbps, and when travelling carriage uses only ground floor code string execution decoding, the decoded data of the transmission rate of the 32kpbs that acquisition should guarantee at least.
The ground floor code string is imported into CRC code addition part 102, and is to add the CRC code that is used for error-detecting to it at interval with the predetermined block.And second layer code string is imported into CRC code addition part 103, and is to add the CRC code that is used for error-detecting to it at interval with the predetermined block.The ground floor code string and the second layer code string that comprise the CRC code are imported into modulating part 104.
Modulating part 104 is modulated to code element with ground floor code string and second layer code string.For example, when using 16QAM to be used as modulation scheme, a code element is made of four bits, therefore modulating part 104 is carried out modulation, be assigned to 2 higher bits of a code element with the corresponding bits of ground floor code string, be assigned to 2 lower bits of a code element with the corresponding bits of second layer code string.
Transmission power control part 105 is according to the transmitted power of determining to control modulated code element in transmitted power determining section 109.The concrete grammar of determining transmitted power will be described below.
Code element after transmission power control is carried out wireless processing such as up conversion at wireless portion 106, and uses FACH (forward direction access channel) and DSCH (downlink sharied signal channel) to be sent to a plurality of travelling carriages simultaneously by antenna 107.That is, carry out MBMS to a plurality of travelling carriages from base station apparatus.
Because a code element comprises ground floor code string and second layer code string, so the transmitted power of ground floor code string is substantially equal to the transmitted power of second layer code string.And FACH is the downlink sharied signal channel direction, and is used to send control information and user data.FACH is shared by a plurality of travelling carriages, and be used for from higher level than the data transmission of low rate etc.On the other hand, DSCH is a downlink sharied signal channel, and is used to send grouped data.DSCH is shared by a plurality of travelling carriages, and is mainly used in the data transmission of higher rate.
Fig. 2 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 1.Travelling carriage shown in Figure 2 comprises antenna 201, wireless portion 202, demodulation part 203, separating part 204, error-detecting part 205, error-detecting part 206, hierarchical decoding part 207 and ACK/NACK response part 208.
The code element that demodulation part 203 comes demodulation to receive according to the modulation scheme of base station.For example, when the base station is used 16QAM as modulation scheme, the code element that demodulation part 203 uses the 16QAM demodulation scheme to come demodulation to receive.Be imported into separating part 204 by the code element of demodulation.
Because each code element by demodulation part 203 demodulation comprises 4 bits, so separating part 204 is 2 higher bits and 2 lower bits with described 4 bit separation.Because the ground floor code string is assigned to described 2 higher bits and second layer code string is assigned to described 2 lower bits as mentioned above, therefore this separation makes described 4 bits be separated into ground floor code string and second layer code string.The ground floor code string is imported into error-detecting part 205, and second layer code string is imported into error-detecting part 206.
Error-detecting part 205 is to carry out CRC to check whether the ground floor code string comprises error at interval with the predetermined block.When detecting error, error-detecting part 205 is discarded in the described code string that comprises in the piece.On the other hand, when not detecting error, the code string that error-detecting part 205 comprises in described to 207 inputs of hierarchical decoding part.And error-detecting part 205 is to CRC result's (exist/not having error) of ACK/NACK response part 208 input ground floor code strings.
Error-detecting part 206 is being to carry out CRC to check whether second layer code string comprises error at interval with the predetermined block.When having error, error-detecting part 206 is discarded in the described code string that comprises in the piece.On the other hand, when not detecting error, the code string that error-detecting part 206 comprises in described to 207 inputs of hierarchical decoding part.And error-detecting part 206 is to CRC result's (exist/not having error) of ACK/NACK response part 208 input second layer code strings.
When not detecting error in ground floor code string and second layer code string, hierarchical decoding part 207 receives ground floor code string and second layer code string, and uses ground floor code string and second layer code string to carry out decoding.Therefore, in this case, obtain the decoded data of 64kbps.And, when in the ground floor code string, not detecting error but in second layer code string, detecting error, only import the ground floor code string, so hierarchical decoding part 207 only uses the ground floor code string to carry out decoding.Therefore, in this case, obtain the decoded data of 32kbps.
Because carry out coding as mentioned above so that the error rate of ground floor code string becomes less than the error rate of second layer code string, therefore do not have following situation: in normal circumstances, the ground floor code string comprises error, and second layer code string does not comprise error.In other words, when in second layer code string, not having error, estimate in the ground floor code string, also not exist error naturally.Second layer code string does not comprise the situation of error if there is the ground floor code string to comprise error, because second layer code string is the code string that appends to the ground floor code string, therefore can not only use second layer code string to obtain decoded data.And, when ground floor code string and second layer code string all comprise error, do not obtain decoded data certainly.
ACK/NACK response part 208 produces ack signal or the NACK signal that is respectively applied for ground floor code string and second layer code string according to the CRC result in error-detecting part 205 and error-detecting part 206.That is, ACK/NACK response part 208 produces the ack signal that is used for the ground floor code string when not having error in the ground floor code string, and produces the NACK signal that is used for the ground floor code string when having error in the ground floor code string.And ACK/NACK response part 208 produces the ack signal that is used for second layer code string when not having error in second layer code string, and produces the NACK signal that is used for second layer code string when having error in second layer code string.Ack signal of Chan Shenging and NACK signal are imported into wireless portion 202 by this way, and carry out wireless processing such as up conversion at wireless portion 202, and are sent to base station apparatus by antenna 201.Because base station apparatus sends same code element to a plurality of travelling carriages, the ack signal/NACK signal that therefore is used for the ground floor code string is beamed back base station apparatus with the ack signal/NACK signal that is used for second layer code string from described a plurality of travelling carriages.
At this, as shown in Figure 3, suppose the situation of carrying out MBMS as travelling carriage #1 (MS#1) near base station apparatus (BS) and travelling carriage #2 (MS#2) when being positioned at cell boarder.Wireless channel control desk (RNC) use cable etc. is connected to a plurality of base station apparatus, manages the wireless zone of being made up of a plurality of sub-districts, and carries out control for the connection of wireless channel.As shown in the figure, described base station apparatus sends ground floor code string and the second layer code string with different error rates and identical transmitted power to travelling carriage # 1 with travelling carriage # 2 simultaneously.Because second layer code string has the error rate characteristic lower than ground floor code string, even when travelling carriage # 1 and travelling carriage # 2 receive same code element, receive the possibility height of ground floor code string and second layer code string near the travelling carriage # 1 of described base station apparatus error freely, and receive the possibility height that the ground floor code string still has error ground reception second layer code string error freely away from the travelling carriage # 2 of described base station apparatus.Therefore, travelling carriage # 1 can receive the 64kbps data, and travelling carriage # 2 can receive the 32kbps data that guarantee the transmission rate as the minimum of MBMS.And, in the quality of reception of travelling carriage # 1 greater than the quality of reception at travelling carriage # 2.
The method more specifically of determining transmitted power then then is described.
The quantity of the ack signal of the ratio of high-quality travelling carriage=second layer code string
/ the quantity (1) of all travelling carriages in this sub-district
At this, when in second layer code string, not having error, naturally consider in the ground floor code string, also not have error, therefore in expression formula (1), only use the ack signal of second layer code string and do not use the ack signal of ground floor code string to calculate the ratio of high-quality travelling carriage.
In above-mentioned expression formula (1), the quantity of all travelling carriages in this sub-district can be calculated as the ack signal beamed back and the sum of NACK signal.Perhaps, because known the sum of the travelling carriage in this sub-district at the wireless channel control desk, therefore the ratio calculating section 108 of described base station apparatus also can be notified in the sum of the travelling carriage this sub-district from the wireless channel control desk.By this way, when knowing travelling carriage in this sub-district total at the wireless channel control desk, be not to beam back all ack signals/NACK signal of ground floor code string and the ack/nack signal of second layer code string, the ACK/NACK response part 208 of travelling carriage shown in Figure 2 can be beamed back the ack signal of second layer code string only and NACK signal or the ack signal of second layer code string only.And, when knowing travelling carriage in this sub-district total, the sum that might deduct the NACK signal of the ack signal of ground floor code string and NACK signal and second layer code string by the sum from travelling carriage is known the quantity of the ack signal of second layer code string, and therefore the ACK/NACK response part 208 of travelling carriage shown in Figure 2 also can be beamed back the ack signal/NACK signal of ground floor code string and the NACK signal of second layer code string only.
The ratio of the high-quality travelling carriage that calculates at ratio calculating section 108 is imported into transmitted power determining section 109.Transmitted power determining section 109 compares the ratio of the described high-quality travelling carriage that is calculated by ratio calculating section 108 and the desired ratio desired value of storage in desired value storage area 110.Then, determine transmitted power according to comparative result.
Promptly, when the ratio of high-quality travelling carriage less than described desired value and default the going up in limited time that only do not reach transmitted power when transmitted power, transmitted power determining section 109 is determined the transmitted power of a code element is increased predetermined quantity so that be increased in the ratio of the high-quality travelling carriage in this sub-district, and instruction transmission power control part 105 increases the transmitted power of described code element.Transmission power control part 105 is according to the quantity of the transmitted power increase of the code element of modulation being scheduled to from the instruction of transmitted power determining section 109.
On the other hand, when the ratio of high-quality travelling carriage is equal to or greater than desired value, transmitted power determining section 109 is determined the transmitted power of described code element is reduced predetermined quantity, so that be reduced in the ratio of the high-quality travelling carriage in this sub-district, and instruction transmission power control part 105 reduces the transmitted power of described code element.Transmission power control part 105 is according to the quantity of the transmitted power of the code element of modulation being scheduled to from the currency reduction from the instruction of transmitted power determining section 109.
By carrying out transmission power control in MBMS, present embodiment can will can remain to the ratio of expectation with the ratio that different error rates receives the high-quality travelling carriage of ground floor code string and second layer code string error freely in this sub-district.
(embodiment 2)
Present embodiment and embodiment 1 do not coexist not only and to control transmitted power according to the ratio of high-quality travelling carriage but also according to the instruction from the increase/reduction transmitted power of travelling carriage.
Fig. 4 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 2.Travelling carriage shown in Figure 4 is made of the travelling carriage (Fig. 2) of embodiment 1, comprises that also CIR measure portion 209 and TPC (transmission power control) signal generator divides 210.Fig. 5 is the block diagram that illustrates according to the described configuration in base station of embodiments of the invention 2.Base station shown in Figure 5 is included in the base station (Fig. 1) among the embodiment 1, and determines that to transmitted power device has increased TPC signal determining section 111.In the following description, with the detailed description of omitting with those identical parts in embodiment 1.
In travelling carriage shown in Figure 4, CIR measure portion 209 is measured the quality of reception that CIR (Carrier interference ratio) is used as institute's receiving symbol, and divides 210 inputs described cir value to the TPC signal generator.The TPC signal generator divides 210 cir values according to input to produce the TPC signal.More specifically, when the CIR that measures in CIR measure portion 209 less than predetermined CIR so that when obtaining the transmission rate of the 32kbps that should guarantee at least, the TPC signal generator divides 210 to produce the TPC signals, being used for instruction increases transmitted power.On the other hand, when the CIR that measures in CIR measure portion 209 is equal to or greater than predetermined CIR so that during the transmission rate of the 32kbps that obtains should guarantee at least, the TPC signal generator divides 210 to produce the TPC signals, is used for instruction and reduces transmitted power.The TPC signal of Chan Shenging is imported into wireless portion 202 by this way, carries out wireless processing such as up conversion at wireless portion 202, is beamed back the base station by antenna 201 then.
Because the base station sends identical code element to a plurality of travelling carriages, base station therefore shown in Figure 5 receives the TPC signal from a plurality of travelling carriages.In Fig. 5, the TPC signal that receives by antenna 107 carries out wireless processing such as down conversion at wireless portion 106, is imported into TPC signal determining section 111 then.
TPC signal determining section 111 determines whether and should increase or reduce transmitted power according to the TPC signal from a plurality of travelling carriages.When at least one transmission of described a plurality of travelling carriages was used to increase the instruction of transmitted power, TPC signal determining section 111 was determined to increase transmitted power.On the other hand, when all described a plurality of travelling carriages transmissions were used to reduce the instruction of transmitted power, TPC signal determining section 111 was determined to reduce transmitted power.Determine that the result is imported into transmitted power determining section 109.
Transmitted power determining section 109 is determined the transmitted power of modulated symbol as shown in Figure 6.That is, when the ratio of high-quality travelling carriage during, in definite result of TPC signal determining section 111 how no matter transmitted power determining section 109 determines that transmitted powers with code element increase scheduled volume less than desired value.
On the other hand, when the ratio of high-quality travelling carriage was equal to or greater than desired value, transmitted power determining section 109 determined to increase or reduce transmitted power according to the definite result in TPC signal determining section 111.Promptly, when TPC signal determining section 111 is determined to increase transmitted power (, when at least one transmission of a plurality of travelling carriages is used to increase the instruction of transmitted power), transmitted power determining section 109 is determined the transmitted power of code element is increased scheduled volume, and it is opposite, when TPC signal determining section 111 is determined to reduce transmitted power (when all described a plurality of travelling carriages transmissions are used to reduce the instruction of transmitted power), transmitted power determining section 109 is determined the transmitted powers of code element are reduced scheduled volumes.
Present embodiment uses CIR to be used as the quality of reception, but is used to indicate the value of the quality of reception to be not limited to CIR, also can use received power and SIR (signal to noise ratio).This is applicable to the following examples.
And, in the present embodiment, produce the TPC signal according to the CIR of the code element that is received.Described code element can be to use FACH and DSCH from the code element of base station transmission or such as the code element such as voice signal of using DPCH (DPCH) to send from the base station.DPCH is the channel in the uplink/downlink two-way channel, and is assigned to a travelling carriage independently.By this way, present embodiment uses the TPC signal to carry out control, and can therefore more reliably the ratio of high-quality travelling carriage be remained to the ratio of expectation.
(embodiment 3)
Present embodiment and embodiment 1 be different to be the ratio of the mean value calculation of the BLER (piece error rate) that calculates at a plurality of moving table measurings as the high-quality travelling carriage.
Fig. 7 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 3.Travelling carriage shown in Figure 7 is to be made of the travelling carriage in embodiment 1 (Fig. 2), and ACK/NACK response part 208 is replaced with BLER measure portion 211.In the following description, with the detailed description of omitting with those identical parts in embodiment 1.
Error-detecting part 205 is to carry out CRC at interval whether to have any error to check in the ground floor code string with the predetermined block.Error-detecting part 205 is to CRC result's (exist/not having error) of BLER measure portion 211 input ground floor code strings.
Error-detecting part 206 is to carry out CRC at interval whether to have any error to check in second layer code string with the predetermined block.Then, error-detecting part 206 is to CRC result's (exist/not having error) of BLER measure portion 211 input second layer code strings.
The CRC result that BLER measure portion 211 is used in error-detecting part 205 and error-detecting part 206 measures the BLER of ground floor code string and the BLER of second layer code string.Indicate the BLER signal of corresponding measured BLER to be imported into wireless portion 202, carry out wireless processing, be sent out go back to the base station by antenna 201 then such as up conversion at wireless portion 202.Because send identical code element from the base station to a plurality of travelling carriages, so the BLER signal of the BLER signal of ground floor code string and second layer code string is beamed back the base station from a plurality of travelling carriages.
Identical according to the configuration of the base station of embodiments of the invention 3 and embodiment 1 (Fig. 1).But embodiment 3 is different in the operation of ratio calculating section 108 and transmitted power determining section 109.And desired value storage area 110 is stored target BLER in advance.
According to present embodiment, ratio calculating section among Fig. 1 108 receives the BLER signal of the ground floor code string of beaming back from a plurality of travelling carriages and the BLER signal of second layer code string.Then, ratio calculating section 108 calculates the ratio of the high-quality travelling carriage in this sub-district according to following expression (2).That is, the mean value calculation of the BLER of the second layer code string that will beam back from described a plurality of travelling carriages of ratio calculating section 108 is the ratio of high-quality travelling carriage.
The ratio of high-quality travelling carriage
The sum (2) of the travelling carriage of the total value of the BLER of=second layer code string/in this sub-district
The mean value of the BLER that is calculated by ratio calculating section 108 is imported into transmitted power determining section 109.The mean value of the BLER that transmitted power determining section 109 will be calculated at ratio calculating section 108 is compared with the target BLER that stores in desired value storage area 110.Then, determine transmitted power according to comparative result.
Promptly, when the mean value of BLER during less than target BLER, and only when transmitted power does not reach the preset upper limit of transmitted power, transmitted power determining section 109 is determined the transmitted power of code element is increased scheduled volume so that be increased in the ratio of the high-quality travelling carriage in this sub-district, and instruction transmission power control part 105 increases the transmitted power of described code element.Transmission power control part 105 is according to from the instruction of transmitted power determining section 109 transmitted power of modulated symbol being increased scheduled volume.
On the other hand, when the mean value of BLER is equal to or greater than target BLER, transmitted power determining section 109 is determined the transmitted power of described code element is reduced scheduled volume so that be reduced in the ratio of the high-quality travelling carriage in this sub-district, and instruction transmission power control part 105 reduces the transmitted power of described code element.Transmission power control part 105 is according to from the instruction of transmitted power determining section 109 transmitted power of modulated symbol being reduced scheduled volume from currency.
By this way, present embodiment uses BLER to carry out control, and therefore can more reliably the ratio of high-quality travelling carriage be remained to the ratio of expectation.
(embodiment 4)
Present embodiment and embodiment 1 do not coexist according to determining transmitted power from the quality of reception of travelling carriage notice.
Fig. 8 is the block diagram that illustrates according to the configuration of the travelling carriage of embodiments of the invention 4.Travelling carriage shown in Figure 8 is made of the travelling carriage in embodiment 1 (Fig. 2), comprises that also CIR measure portion 209 and CIR signal generator divide 212.And Fig. 9 is the block diagram that illustrates according to the configuration of the base station of embodiments of the invention 4.Base station shown in Figure 9 is made of the base station in embodiment 1 (Fig. 1), and transmitted power determines that device also comprises classification part 112.In the following description, omit for the explanation of those identical parts in embodiment 1.
In travelling carriage shown in Figure 8, ACK/NACK response part 208 produces ack signal and the NACK signal that is respectively applied for ground floor code string and second layer code string according to the CRC result in error-detecting part 205 and error-detecting part 206.Ack signal that is produced and NACK signal are imported into wireless portion 202, carry out wireless processing such as up conversion at wireless portion 202, and are beamed back the base station by antenna 201.
Because the base station sends identical code element to a plurality of travelling carriages, base station therefore shown in Figure 9 receives the ack signal/NACK signal of ground floor code string and the ack signal/NACK signal and the CIR signal of second layer code string from a plurality of travelling carriages.In Fig. 9, ack signal/NACK signal that receives by antenna 107 and CIR signal are carried out the wireless processing such as down conversion at wireless portion 106, and are imported into classification part 112.
And as in embodiment 1, the ratio of the high-quality travelling carriage that calculates at ratio calculating section 108 is imported into transmitted power determining section 109.
According to classification results, transmitted power determining section 109 is determined transmitted power is increased following amount, promptly at the minimum cir of the CIR of the travelling carriage of the ack signal of beaming back second layer code string (CIR=7[dB of travelling carriage # 4 in Figure 10]) with returned poor between the CIR of travelling carriage of NACK signal, so that the desired ratio desired value of coupling storage in desired value storage area 110.
More specifically, in Figure 10, only 3 ack signals of having beamed back second layer code string in 8 travelling carriages, therefore the ratio of current high-quality travelling carriage is 37.5%.When the desired value in being stored in desired value storage area 110 is 50%, if a more travelling carriage beam back second layer code string ack signal, mean four ack signals of having beamed back second layer code string of 8 travelling carriages, then the ratio of high-quality travelling carriage reaches desired value.That is, in Figure 10, might make travelling carriage #1 beam back ack signal.Now, in Figure 10, in the travelling carriage of beaming back ack signal notified minimum cir be travelling carriage #4, and CIR is 7[dB].Therefore, from this classification results, might be with 7[dB] as minimum necessary CIR, so that receive second layer code string error freely.Therefore, might be with 1[dB]---it is the CIR=7[dB at travelling carriage #4] and the CIR=6[dB of travelling carriage #1] between poor---beam back the recruitment of the needed transmitted power of ack signal as travelling carriage #1.Therefore, transmitted power determining section 109 is determined transmitted power is increased 1[dB].At this, travelling carriage #1 is taken as target, because travelling carriage #1 is the travelling carriage that has sent optimum reception quality in all travelling carriages of NACK signal, it only needs to be used to beam back the transmitted power recruitment of the needed minimum of ack signal (that is, guaranteeing to receive second layer code string) of second layer code string error freely.
And, when desired value is 62.5%, if from more two travelling carriages beam back second layer code string ack signal, mean the ack signal of beaming back second layer code string from 5 travelling carriages of 8 travelling carriages, then the ratio of high-quality travelling carriage reaches desired value.That is, in Figure 10, might make travelling carriage # 1 and travelling carriage # 6 also beam back ack signal.Might be with 4[dB]---it is the CIR=7[dB at travelling carriage #4] and the CIR=3[dB of travelling carriage #6] between poor---as recruitment in this needed transmitted power.Therefore, transmitted power determining section 109 is determined transmitted power is increased 4[dB].
Therefore, present embodiment is relatively determined transmitted power according to the classification results based on the quality of reception, and the transmitted power of the ratio of the high-quality travelling carriage that reaches expectation can be set thus quickly.
(embodiment 5)
Present embodiment and embodiment 4 are roughly the same, and only do not coexist with embodiment 4 and to set in advance transmitted power determining section 109 to receive the needed quality of reception of second layer code string error freely.
Identical according to those of the configuration of the travelling carriage of present embodiment and base station and embodiment 4 (Fig. 8, Fig. 9), and operation and embodiment 4 different of the transmitted power determining section 109 of base station apparatus only.The operation of the transmitted power determining section 109 of present embodiment will be described below.
According to classification results, transmitted power determining section 109 is determined transmitted power is increased in poor between the CIR of the travelling carriage that receives the needed CIR of second layer code string error freely and beamed back the NACK signal, so that the desired ratio desired value of coupling storage in desired value storage area 110.Receive the needed CIR of second layer code string error freely and measured in advance, and be set in advance in transmitted power determining section 109.
More specifically, in Figure 10, beam back the ack signal of second layer code string from only 3 travelling carriages of 8 travelling carriages, so the ratio of high-quality travelling carriage is 37.5%.When the desired value of storage in desired value storage area 110 is 50%, if a more travelling carriage beam back second layer code string ack signal, mean four ack signals of having beamed back second layer code string of 8 travelling carriages, then the ratio of high-quality travelling carriage reaches desired value.That is, in Figure 10, might make travelling carriage #1 also beam back ack signal.Therefore, when being assumed to be it is CIR=7[dB at the default CIR of transmitted power determining section 109] time, be 1[dB in the recruitment of this needed transmitted power], it is at CIR=7[dB] and the CIR=6[dB of travelling carriage #1] between poor.Therefore, transmitted power determining section 109 is determined transmitted power is increased 1[dB].At this, travelling carriage #1 is taken as target, because travelling carriage #1 is a travelling carriage of having beamed back optimum reception quality in all travelling carriages of NACK signal, it only needs to be used to beam back the transmitted power recruitment of the needed minimum of ack signal (that is, guaranteeing to receive second layer code string) of second layer code string error freely.
And, when desired value is 62.5%, if from more two travelling carriages beam back second layer code string ack signal, mean the ack signal of beaming back second layer code string from 5 travelling carriages of 8 travelling carriages, then the ratio of high-quality travelling carriage reaches desired value.That is, in Figure 10, might make travelling carriage # 1 and travelling carriage # 6 also beam back ack signal.Recruitment in this needed transmitted power is 4[dB], it is at the default CIR=7[dB of transmitted power determining section 109] and the CIR=3[dB of travelling carriage #6] between poor.Therefore, transmitted power determining section 109 is determined transmitted power is increased 4[dB].
By this way, present embodiment is determined transmitted power according to the classification results based on the absolute value of the quality of reception of the quality of reception and expectation, and can be thus with the expense (wastage) of minimum transmitted power corresponding to the ratio of the high-quality travelling carriage of expectation be set.
The above embodiments have adopted such configuration, and wherein transmitted power determines that device is used to the base station, and transmitted power is determined in described base station.But, also may adopt such configuration, wherein transmitted power determines that device is used for wireless channel control desk rather than base station, and described wireless channel control desk determines transmitted power, and to base station notice transmitted power.
And according to the above embodiments, hierarchical coding is carried out in the base station, and it is by data being divided into the two-layer coding of realizing.But this hierarchical coding also can be carried out by the wireless channel control desk or by the content server that is connected with the wireless channel control desk.In this case, ground floor code string and second layer code string are from wireless channel control desk or content server and line output.
And the above embodiments are at two-layer execution hierarchical coding, but the invention is not restricted to two-layer, and if the quantity of layer be 2 at least, can use any amount of layer.When for example in three layers, carrying out coding, might use 64QAM (1 code element comprises 6 bits) to be used as modulation scheme, and identical with above-mentioned situation, use a plurality of code strings of coding in three layers of the error rate of 2 bits that are assigned to each code element to carry out modulation.
As mentioned above, in MBMS, the present invention can be controlled at the ratio that can receive the travelling carriage of information in a plurality of travelling carriages that exist in the sub-district with high-quality.
The application is based on the Japanese patent application of submitting on December 26th, 2002 2002-376706 number, and its whole content is comprised by reference clearly at this.
Application on the industry
The present invention can be applied to radio communication base station device, the wireless communication of using in GSM Road console and radio communication mobile station device.
Claims (9)
1. a transmitted power is determined device, comprising:
Determining section is used to determine comprise the transmitted power of the code element of ground floor code string and second layer code string, and described ground floor code string has the different error rate of layering with second layer code string; And
Storage area is used to store the desired value with respect to the ratio of the travelling carriage that receives described ground floor code string and second layer code string error freely,
Wherein said determining section determines to increase the transmitted power of described code element during less than described desired value when described ratio.
2. determine device according to the transmitted power of claim 1, the error rate of wherein said ground floor code string is less than the error rate of second layer code string, and
Described transmitted power determines that device also comprises the ratio calculating section, is used for according to calculating described ratio at the sum of the travelling carriage of sub-district and the quantity that receives the travelling carriage of described second layer code string error freely.
3. determine device according to the transmitted power of claim 1, wherein when described ratio is equal to or greater than described desired value, when at least one transmission of a plurality of travelling carriages is used to increase the instruction of transmitted power, described determining section determine to increase the transmitted power of described code element, and determines the transmitted power of the described code element of reduction when all described travelling carriages send the instruction that is used to reduce transmitted power.
4. determine device according to the transmitted power of claim 1, the error rate of wherein said ground floor code string is less than the error rate of second layer code string, and
And described transmitted power determines that device also comprises the ratio calculating section, and being used for the mean value calculation at the BLER of the described second layer code string of a plurality of travelling carriages is described ratio.
5. determine device according to the transmitted power of claim 1, the error rate of wherein said ground floor code string is less than the error rate of second layer code string, and
Described determining section is according to the recruitment of determining the transmitted power of described code element in the quality of reception of travelling carriage and error free the difference that receives between the needed quality of reception of described second layer code string.
6. determine device according to the transmitted power of claim 5, wherein said determining section will be in the minimum quality of reception of the quality of reception of the travelling carriage that receives second layer code string error freely as receive the needed quality of reception of described second layer code string error freely.
7. a radio communication base station device comprises according to the transmitted power of claim 1 and determines device.
8. a wireless channel control desk device comprises according to the transmitted power of claim 1 and determines device.
9. a transmitted power is determined method, is used for: determine to comprise the transmitted power of the code element of ground floor code string and second layer code string, described ground floor code string has the different error rate of layering with second layer code string; Determine to increase the transmitted power of described code element when being used for ratio when the travelling carriage that receives ground floor code string and second layer code string error freely less than the desired destination value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002376706A JP3809415B2 (en) | 2002-12-26 | 2002-12-26 | Transmission power determination device and transmission power determination method |
| JP376706/2002 | 2002-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1692581A true CN1692581A (en) | 2005-11-02 |
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| CNA200380100552XA Pending CN1692581A (en) | 2002-12-26 | 2003-12-17 | Transmission power deciding apparatus and transmission power deciding method |
Country Status (7)
| Country | Link |
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| US (1) | US20050272456A1 (en) |
| EP (1) | EP1578035A1 (en) |
| JP (1) | JP3809415B2 (en) |
| KR (1) | KR100669909B1 (en) |
| CN (1) | CN1692581A (en) |
| AU (1) | AU2003289379A1 (en) |
| WO (1) | WO2004059883A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461877C (en) * | 2006-12-31 | 2009-02-11 | 华为技术有限公司 | Method for controlling multimedia broadcast group broadcast service load |
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| ATE350866T1 (en) * | 2004-10-21 | 2007-01-15 | Cit Alcatel | METHOD FOR PROVIDING AN MBMS SERVICE IN A WIRELESS COMMUNICATIONS SYSTEM |
| KR101084127B1 (en) * | 2004-12-27 | 2011-11-17 | 엘지전자 주식회사 | Method of supporting HARQ in OFDMA radio access system |
| JP4513974B2 (en) | 2005-06-27 | 2010-07-28 | 日本電気株式会社 | Wireless communication network that broadcasts high-priority information, method for changing the same, and wireless communication network design tool |
| DE102005032080A1 (en) * | 2005-07-08 | 2007-01-11 | Siemens Ag | A method for transmitting a media data stream and a method for receiving and creating a reconstructed media data stream, and associated transmitting device and receiving device |
| US7769402B2 (en) * | 2005-11-23 | 2010-08-03 | Motorola, Inc. | Adaptive bearer configuration for broadcast/multicast service using received response information |
| EP1892892A1 (en) * | 2006-08-24 | 2008-02-27 | Nokia Siemens Networks Gmbh & Co. Kg | Method and network entities for supporting MBMS service in a LTE radio communication network |
| EP2127126A2 (en) * | 2007-01-12 | 2009-12-02 | Nokia Corporation | Apparatus, methods, and computer program products providing resource allocation adaptation for point-to-multipoint transmissions |
| US20100110959A1 (en) * | 2007-01-26 | 2010-05-06 | Shinya Shimobayashi | Mobile communication system, terminal device, base station device and data communication method |
| US7844728B2 (en) * | 2007-07-31 | 2010-11-30 | Alcatel-Lucent Usa Inc. | Packet filtering/classification and/or policy control support from both visited and home networks |
| WO2010001475A1 (en) * | 2008-07-03 | 2010-01-07 | 富士通株式会社 | Base station apparatus and data mapping method |
| JP5537000B2 (en) | 2008-08-13 | 2014-07-02 | 富士通株式会社 | Multimedia broadcasting / broadcasting service communication control method and apparatus |
| US8218493B2 (en) * | 2008-09-08 | 2012-07-10 | Wisconsin Alumni Research Foundation | System and method for interference mitigation in wireless networks |
| KR101481549B1 (en) * | 2008-09-18 | 2015-01-13 | 엘지전자 주식회사 | Method for transmitting and identifying transmission power ratio for multiuser MIMO |
| JP5629982B2 (en) * | 2009-06-01 | 2014-11-26 | 富士通株式会社 | Wireless relay apparatus, wireless relay method, and wireless communication system |
| CN102474733B (en) * | 2009-07-16 | 2015-08-05 | 富士通株式会社 | Wireless communication system, relay station and wireless communications method |
| US9667362B2 (en) | 2014-09-19 | 2017-05-30 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting channel quality indicator in communication system |
| JP2017063371A (en) * | 2015-09-25 | 2017-03-30 | シャープ株式会社 | Communication device, communication processing method, and program |
| CN109964512B (en) * | 2016-11-16 | 2022-03-25 | 杜塞尔多夫华为技术有限公司 | Wireless device and wireless cell with multiplexed data sequences of unequal power allocation |
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| JPH08204768A (en) * | 1995-01-24 | 1996-08-09 | Mitsubishi Electric Corp | Digital signal transmitter and receiver |
| JP3594527B2 (en) * | 2000-03-16 | 2004-12-02 | 三洋電機株式会社 | Wireless communication quality measuring device, wireless communication quality measuring method, and receiving device |
| SG109450A1 (en) * | 2000-04-06 | 2005-03-30 | Ntt Docomo Inc | Multicast signal transmission power control method and base station using the same |
| JP2001339466A (en) * | 2000-05-29 | 2001-12-07 | Oki Electric Ind Co Ltd | Variable-rate code receiving device |
| JP4654426B2 (en) * | 2000-12-28 | 2011-03-23 | 独立行政法人情報通信研究機構 | Wireless communication apparatus, program transmission apparatus and method, and wireless communication system |
| EP1273145A1 (en) * | 2001-03-13 | 2003-01-08 | Matsushita Electric Industrial Co., Ltd. | Method and system for blind detection of modulation type |
| US7043210B2 (en) * | 2001-06-05 | 2006-05-09 | Nortel Networks Limited | Adaptive coding and modulation |
| KR100474682B1 (en) * | 2001-10-31 | 2005-03-08 | 삼성전자주식회사 | Method and apparatus for transmitting/receiving for re-transmission of packet in wireless communication system |
| JP3828431B2 (en) * | 2002-01-31 | 2006-10-04 | 株式会社エヌ・ティ・ティ・ドコモ | Base station, control apparatus, communication system, and communication method |
| KR100713435B1 (en) * | 2002-05-03 | 2007-05-07 | 삼성전자주식회사 | Apparatus for supporting multi data rate in mobile communication system and method thereof |
| JP3840435B2 (en) * | 2002-07-05 | 2006-11-01 | 松下電器産業株式会社 | Radio communication base station apparatus, radio communication mobile station apparatus, and radio communication method |
-
2002
- 2002-12-26 JP JP2002376706A patent/JP3809415B2/en not_active Expired - Fee Related
-
2003
- 2003-12-17 EP EP03780815A patent/EP1578035A1/en not_active Withdrawn
- 2003-12-17 AU AU2003289379A patent/AU2003289379A1/en not_active Abandoned
- 2003-12-17 WO PCT/JP2003/016139 patent/WO2004059883A1/en not_active Application Discontinuation
- 2003-12-17 CN CNA200380100552XA patent/CN1692581A/en active Pending
- 2003-12-17 KR KR1020047019108A patent/KR100669909B1/en not_active IP Right Cessation
- 2003-12-17 US US10/516,365 patent/US20050272456A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461877C (en) * | 2006-12-31 | 2009-02-11 | 华为技术有限公司 | Method for controlling multimedia broadcast group broadcast service load |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003289379A1 (en) | 2004-07-22 |
| EP1578035A1 (en) | 2005-09-21 |
| KR20050000431A (en) | 2005-01-03 |
| JP2004208153A (en) | 2004-07-22 |
| US20050272456A1 (en) | 2005-12-08 |
| KR100669909B1 (en) | 2007-01-16 |
| JP3809415B2 (en) | 2006-08-16 |
| WO2004059883A1 (en) | 2004-07-15 |
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